Jellyfish are beautiful, no one is denying that, but their tentacles contain thousands of stinging cells which will activated by physical contact on preys or human skin. These cells contain shafts and tubules that inject poison to the skin, causing you pain, redness, and rash skin. Even if they don't kill you, the stings will surely cause some degree of discomfort. Safe Sea may not be the world's first anti-jellyfish lotion, but it is dermatologically tested and it is the world's only lotion scientifically developed to help prevent the stings from most of the jellyfish including Atlantic Box jellyfish and Rhopilema, Sea Nettle, Sea bathers Eruption (commonly known as sea lice) and other stinging marine organisms. Each 4 oz. bottle gives roughly four adult a full-body applications. Re-apply every two hours to get maximum protection. For better result, please use Safe Sea lotion within 3 years of purchase. Made in Israel.